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Method for directly synthesizing sucrose fatty acid ester by biodiesel and sucrose

A technology of sucrose fatty acid ester and biodiesel, which is applied in chemical instruments and methods, sugar derivatives, sugar derivatives, etc., can solve the problem that catalysts cannot be recycled, and achieves low industrial cost, low raw material cost, and no environmental pollution. Effect

Inactive Publication Date: 2012-01-04
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the shortcomings of the prior art that it needs to be reacted under vacuum and high temperature, and the catalyst cannot be recycled, the present invention provides a method for directly synthesizing sucrose fatty acid ester from biodiesel and sucrose, which is reacted under normal pressure and relatively low temperature. Catalysts can be recycled and reused

Method used

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  • Method for directly synthesizing sucrose fatty acid ester by biodiesel and sucrose
  • Method for directly synthesizing sucrose fatty acid ester by biodiesel and sucrose

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Preparation of supported solid base catalyst: Weigh the catalyst potassium carbonate and activated carbon carrier with a molar ratio of 1:25 and impregnate them for 24 hours by equal volume impregnation method, filter, dry the filter cake at 120°C for 2 hours, and calcinate at 450°C After 5h, obtain loaded solid base catalyst---K 2 O / C catalyst;

[0038] (2) Preparation of homogeneous system: after biodiesel and sucrose are mixed in the ratio of biodiesel by mass ratio: sucrose=1:1, add potassium stearate accounting for 15% of the total mass of the mixture, heat up while stirring, at 80 Stir at ℃ for 0.5h, until the reaction system is light yellow emulsion, add 3% of the total mass of the mixture of K 2 O / C catalyst, continue stirring for 0.5h;

[0039] (3) Preparation of sucrose fatty acid ester: heat up while stirring, and pass into N 2 , drive away the air in the reaction system and take away the methanol produced in the reaction, N 2 Raise the temperature to...

Embodiment 2

[0042] (1) Preparation of supported solid base catalyst: Weigh 1: 20 potassium carbonate and activated carbon carrier with molar ratio and impregnate for 24h by equal volume impregnation method, filter, dry the filter cake at 110°C for 3h, and calcined at 600°C for 3h, take out for use;

[0043] (2) Preparation of homogeneous system: after biodiesel and sucrose are mixed in the ratio of biodiesel by mass ratio: sucrose=2:1, add potassium stearate accounting for 10% of the total mass of the mixture, heat up while stirring, at 80 Stir at ℃ for 1.0h, until the reaction system is light yellow emulsion, add 2% of the total mass of the mixture of K 2 O / C catalyst, continue stirring for 0.5h;

[0044] (3) Preparation of sucrose fatty acid ester: heat up while stirring, and pass into N 2 , drive away the air in the reaction system, N 2 Raise the temperature to 130°C under protection, react for 3.5 hours, then cool down to below 100°C, stop feeding N 2 , add water to stop the react...

Embodiment 3

[0047] (1) Preparation of supported solid base catalyst: the K recovered in Example 1 2 The O / C catalyst was washed twice with deionized water and ethyl acetate respectively, dried at 110°C, and set aside;

[0048] (2) Preparation of homogeneous system: after biodiesel and sucrose are mixed in the ratio of biodiesel by mass ratio: sucrose=2:1, add potassium stearate accounting for 5% of the total mass of the mixture, heat up while stirring, at 80 Stir at 0.5 h for 0.5 h until the reaction system is light yellow emulsion, add the K recovered in Example 1 accounting for 3% of the total mass of the mixture 2 O / C catalyst, continue stirring for 0.5h;

[0049] (3) Preparation of sucrose fatty acid ester: heat up while stirring, and pass into N 2 , drive away the air in the reaction system, N 2 Raise the temperature to 135°C under protection, react for 3 hours, then cool down to below 100°C, stop feeding N 2 , add water to stop the reaction, stir at 80°C for 10min;

[0050] (4)...

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Abstract

The invention provides a method for directly synthesizing sucrose fatty acid ester by biodiesel and sucrose, in which a solvent-free method is adopted to synthesize the sucrose fatty acid ester under the protection of N2 and the barometric pressure of 1, and an isovolumetric immersion method is adopted to prepare a load-type solid base catalyst by immersion; then potassium stearate is added afterthe biodiesel is mixed with the sucrose, the mixture is reacted until the reaction system presents in a faint yellow emulsion, then the load-type solid base catalyst is added to continue to react, temperature is raised during stirring, N2 is introduced, methanol generated in the reaction process is removed when air in the reaction system is driven away, warming reaction is carried out under the protection of the N2, then the reaction system is cooled, the introduction of N2 is stopped, water is added to stop reaction, and the product is stirred for 10min at the temperature of 80 DEG C; and the crude product is processed to obtain the refined product of the sucrose fatty acid ester. After the crude product is purified by a solvent extraction method, the product purity is above 98%, the N2 can be reused, and the catalyst can be recycled.

Description

technical field [0001] The invention relates to the field of synthesis of sucrose fatty acid esters, in particular to a method for synthesizing sucrose fatty acid esters using biodiesel as a raw material. Background technique [0002] As a new type of non-ionic surfactant, sucrose ester is non-toxic and harmless to the human body, can be degraded and absorbed by the human body, and has good emulsification, dispersion, solubilization, penetration, foaming, viscosity adjustment, anti-aging, antibacterial, etc. Performance, is widely used in food, medicine, chemical industry, cosmetics, detergent, textile and agriculture and animal husbandry and other industries. It has been successively approved by Japan, the United States, China and other countries as well as the Food and Agriculture Organization of the United Nations, the World Health Organization, and the European Union as food additives and co-solvents. It has huge market demand and broad application prospects. Traditiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H13/06C07H1/00
CPCY02P20/584
Inventor 王奎蒋剑春应浩李翔宇吴欢
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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